Abstract: An apparatus for closing a ventilation opening in a housing of a switch gear in the event of a sudden increase in pressure caused by electric arcing. The apparatus includes a frame which is adapted to be coupled to the housing of the switch gear adjacent the opening, a flap pivotally mounted at the frame, the flap being adapted to be moved from an open position in which the flap overlaps the ventilation opening keeping a gap which allows an airflow through the opening, into a closed position, in which the flap fully covers the opening and blocks the air flow, spring elastic means which urge the flap into the open position, and a retaining element which is adapted to mechanically lock the flap in the closed position after pivoting the flap from the open position into the closed position.

Abstract: A switchgear or control gear includes: at least one first compartment; a second compartment; a plurality of main switchgear or control gear components, the plurality of main switchgear or control gear components including a main busbar system, a three position linear or rotational movement disconnector, a circuit breaker, and a cable connection; and a plurality of auxiliary switchgear or control gear components, the plurality of auxiliary switchgear or control gear components including a disconnector drive and a circuit breaker drive. The plurality of main switchgear or control gear components are housed in the at least one first compartment. The plurality of auxiliary switchgear or control components are housed in the second compartment. The circuit breaker and three position or rotational movement disconnector are mounted vertically in the at least one first compartment.

Abstract: An apparatus for closing a ventilation opening in a housing of a switch gear in the event of a sudden increase in pressure caused by electric arcing. The apparatus includes a frame which is adapted to be coupled to the housing of the switch gear adjacent the opening, a flap pivotally mounted at the frame, the flap being adapted to be moved from an open position in which the flap overlaps the ventilation opening keeping a gap which allows an airflow through the opening, into a closed position, in which the flap fully covers the opening and blocks the air flow, spring elastic means which urge the flap into the open position, and a retaining element which is adapted to mechanically lock the flap in the closed position after pivoting the flap from the open position into the closed position.

Abstract: A switchgear or control gear includes: at least one first compartment; a second compartment; a plurality of main switchgear or control gear components, the plurality of main switchgear or control gear components including a main busbar system, a three position linear or rotational movement disconnector, a circuit breaker, and a cable connection; and a plurality of auxiliary switchgear or control gear components, the plurality of auxiliary switchgear or control gear components including a disconnector drive and a circuit breaker drive. The plurality of main switchgear or control gear components are housed in the at least one first compartment. The plurality of auxiliary switchgear or control components are housed in the second compartment. The circuit breaker and three position or rotational movement disconnector are mounted vertically in the at least one first compartment.

Abstract: A three phase switchgear or control gear includes: at least one compartment; a plurality of components for a first phase; a plurality of components for a second phase; and a plurality of components for a third phase. The plurality of components for the first phase, the second phase, and the third phase each include a connection to a main busbar, a circuit breaker actuator, a single phase circuit breaker pole, and a cable connection. The circuit breaker actuator and the single phase circuit breaker pole for the first phase are oriented along a first axis. The circuit breaker actuator and the single phase circuit breaker pole for the second phase are oriented along a second axis. The circuit breaker actuator and the single phase circuit breaker pole for the third phase are oriented along a third axis. The first axis, the second axis, and the third axis are inclined.

Abstract: A three phase switchgear or control gear includes: at least one compartment; a plurality of components for a first phase; a plurality of components for a second phase; and a plurality of components for a third phase. The plurality of components for the first phase, the second phase, and the third phase each include a connection to a main busbar, a circuit breaker actuator, a single phase circuit breaker pole, and a cable connection. The circuit breaker actuator and the single phase circuit breaker pole for the first phase are oriented along a first axis. The circuit breaker actuator and the single phase circuit breaker pole for the second phase are oriented along a second axis. The circuit breaker actuator and the single phase circuit breaker pole for the third phase are oriented along a third axis. The first axis, the second axis, and the third axis are inclined.

Abstract: A method of earthing two current inlet/outlet systems in a medium or high voltage switchgear using one circuit breaker comprises the following steps: a) switching OFF the circuit breaker; b) connecting the circuit breaker to the first current inlet/outlet system as well as to the earthing; c) switching the circuit breaker ON; d) providing a direct connection between the first current inlet/outlet system and the earthing via a connecting element; e) switching the circuit breaker OFF; f) disconnecting the circuit breaker at least from the first current inlet/outlet system; g) connecting the circuit breaker to the second current inlet/outlet system and to the earthing; and h) switching the circuit breaker ON. A switchgear apparatus to be used for said method is described as well.